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You could do the 7 second test, pull one tube in the video chain while it's warmed up, plug it back in 7 seconds later and see if contrast returns fast or slow and repeat till you find your culprit or through all possible tubes that could cause it.
I have to commend you for actually listing the parts you used for the peaking coils...Other brilliant minds here have gone through the same effort without listing part numbers, and only giving a vague notion of the brand and the process with their specific test equipment, so someone without the right gear can't duicate their results.
It's good to teach the process, but it's also important to explain the results of the process so others can check the work, and benefit from it.
Last edited by Electronic M; 12-29-2022 at 05:09 PM.
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